Whether you're waiting around basecamp for the weather to clear or you're digging out from a foot of fresh snow, The North Face Men's ThermoBall Bootie II provides a toasty oasis from freezing temps and wintry weather. This casual winter-weather boot sheds snow and slush with its recycled P. E. T. ripstop exterior. There's even an elastic gaiter with a drawstring closure to ensure that outside moisture doesn't seep into your socks. Keeping your feet pleasantly warm, the boot's ThermoBall insulation has the heat-trapping loft of down insulation, except it retains its warmth during wet, miserable conditions. Making these boots even more winter-friendly, IcePick lugs relentlessly grip through sub-freezing temps and slick, snow-packed conditions.

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Backcountry.com
refers to the men's version

Suitable for everyday wear on winter walks or at Everest basecamp, the ThermoBall insulated booties feature hidden pockets where you can put handwarmers, adding extra warmth in extreme conditions.

Winter warmth doesn't get any more comfortable than this slip-on bootie that's insulated with ThermoBall technology, our new synthetic alternative to down that achieves the warmth equivalent of 600-fill down without sacrificing the wet-weather insulating performance of a synthetic. Wear this durable winter boot that's crafted with water-resistant recycled ripstop exterior and grippy IcePick luggs around Everest Base Camp or on winter excursions.